Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 11: Cold atoms III - optical lattices (joint session A/Q)
Q 11.3: Vortrag
Montag, 5. März 2018, 14:30–14:45, K 0.011
Interorbital spin exchange in a state-dependent optical lattice — •Luis Riegger1,2, Nelson Darkwah Oppong1,2, Moritz Höfer1,2, Diogo Rio Fernandes1,2, Immanuel Bloch1,2, and Simon Fölling1,2 — 1Max-Planck-Institut für Quantenoptik, Garching — 2Ludwig-Maximilians-Universität, München
We report on the observation of tunable interorbital spin exchange in the presence of a state-dependent optical lattice for the ground state and metastable clock state of fermionic ytterbium-173. The optical lattice potential is independent of the nuclear spin and preserves the SU(N)-symmetry of the interactions, typical for alkaline-earth-like atoms. In the state-dependent lattice, excited-state and ground-state atoms act as localized and mobile magnetic moments. The large difference in the interaction strength for spin-triplet and singlet states leads to spin-exchanging dynamics between the magnetic moments mediated by exchange processes similar to those in the Anderson impurity model. Moreover, we find that the external confinement can be used to resonantly tune the exchange dynamics. This makes our system a promising platform for the study of Kondo- and Kondo-lattice-type physics.